Herr was first arrested Sept. 23 in Hernando County on charges of unlawful sexual activity with a minor. She was arrested again at her Citrus County home the next day on similar charges.

She sent a brief message to principal Rick Markford.

"In light of recent events, I have chosen to resign from my position as teacher," she wrote. "I am deeply sorry for the inconvenience my actions have caused."

Herr is charged with two counts of sexual activity with a minor in Hernando County and one count in Citrus.

Assistant State Attorney Erin Daly, who his handling the Hernando case, said evidence shows Herr and the boy engaged in at least two different sexual acts at a Weeki Wachee hotel on Aug. 24.

Daly said Herr and the boy had multiple encounters in Citrus between mid August and mid September. The prosecutor in that county, Brian Trehy, opted to consolidate the case into one count.

Herr has a status hearing in Citrus Circuit Court on Dec. 10 and in Hernando on Jan. 30.

The 16-year-old was an acquaintance of Herr's daughter and not a student at J.D. Floyd. There is no indication that she has been involved with other minors, according to the Hernando County Sheriff's Office.

In addition to Hernando, Herr has worked with the Citrus County School District. She has also served as a YMCA camp leader and has completed internships at schools in St. Petersburg, Tampa, Land O'Lakes and New Port Richey.

Staff writer Tony Marrero contributed to this report. Danny Valentine can be reached at dvalentine@tampabay.com or (352) 848-1432. On Twitter: @HernandoTimes.